USGS Water-Year Summary for Site 03301940

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Max.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean,Max.,Min.)
	00300 Dissolved oxygen(Min.,Mean,Max.)
	00400 pH(Med.,Min.,Max.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

03301940 NORTHERN DITCH AT OKOLONA, KY

LOCATION - Lat 38°09'01", long 85°41'37" referenced to North American Datum of 1927, Jefferson County, KY, Hydrologic Unit 05140102,

on right bank 80 feet upstream of bridge on Preston Highway at Okolona, 0.1 mile upstream of Spring Ditch, and at mile 5.1.

New Site: Lat 38°08'57.7", Long 85°40'42.7"

DRAINAGE AREA - 11.1 mi².

REVISIONS HISTORY - Discharge for the period Sept. 03, 2020, to Oct. 29, 2020, were revised on June 09, 2022.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1974 to September 1976, March 1988 to February 1991, October 1992 to September 1993, October 1994 to September 1995, October 1997 to May 2007, January 2008 to current year.

GAGE - Water-stage recorder. Datum is 447.00 feet above NAVD of 1988 and 447.5 ft above NGVD of 1929.

COOPERATION - Louisville and Jefferson County Metropolitan Sewer District.

EXTREMES FOR PERIOD OF RECORD - Maximum instantaneous discharge, 1700 ft³/s on September 23, 2006; maximum instantaneous gage height, 14.51' on April 3, 2015. Instantaneous low flow, 0.00 ft³/s on July 12, 2014.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: October 2014 to current year.

pH: October 2014 to current year.

WATER TEMPERATURE: October 2006 to current year. No water temperature data from May 2007 to November 2007 due to stream construction.

DISSOLVED OXYGEN: October 2006 to current year. No dissolved oxygen data from May 2007 to November 2007 due to stream construction.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum recorded, 1,650 uS/cm, February 24, 2018; minimum recorded, 63 uS/cm, March 1, 2017.

pH: Maximum recorded, 9.2 units, March 18, 2017*; minimum recorded, 6.6 units, October 28, 2016.

WATER TEMPERATURE: Maximum recorded, 39.7°C, June 18, 2014; minimum recorded, -0.3°C, February 3-12, 2007, December 21-22, 2008, January 15, 22, and February 5, 2009.

DISSOLVED OXYGEN: Maximum recorded, 26.1 mg/L, May 24, 2008; minimum recorded, 0.0 mg/L, September 12-13, 2014, and July 15, 2019.

* Multiple occurrences of the same extreme in selected data set. First occurrence listed. Other extremes may have occurred during periods of non-published record.